Light-emitting device and method of manufacturing the same

1. A light-emitting device comprising: a supporting base including a depression section on a top surface thereof, the depression section having an inclined surface on a side wall thereof, the side wall spacing the depression section from an uppermost section of the top surface; a first light-emitting element arranged on a bottom surface of the depression section; a second light-emitting element arranged on the first light-emitting element and the supporting base; a first electrode (i) arranged on the uppermost section of the top surface of the supporting base, and (ii) spacing the second light-emitting element from the uppermost section of the top surface of the supporting base; and a second electrode (i) spacing the first light-emitting element from the depression section of the supporting base, (ii) extending along the inclined surface of the depression section, and (iii) operable to supply electricity to the first light-emitting element, wherein, the first electrode and the second electrode are laterally spaced from each other along the top surface of the supporting base; wherein, the supporting base includes an oxidized film between a first silicon substrate and a second silicon substrate, the depression section is arranged in the second silicon substrate, and the depth of the depression section corresponds to the thickness of the second silicon substrate.

2. The light-emitting device according to claim 1 , wherein the supporting base is a silicon substrate.

3. The light-emitting device according to claim 1 , wherein the first light-emitting element and the second light-emitting element each are a semiconductor laser.

4. The light-emitting device according to claim 3 , wherein the emission wavelength of the first light-emitting element is in a 400-nm band.

5. The light-emitting device according to claim 3 , wherein the second light-emitting element includes a plurality of light-emitting points with different emission wavelengths.

6. The light-emitting device according to claim 5 , wherein the second light-emitting element includes a light-emitting point for light with an emission wavelength of 600-nm band and a light-emitting point for light with an emission wavelength of 700-nm band.

7. The light-emitting device according to claim 1 , wherein the first light-emitting element is substantially contained within the depression.

8. A light-emitting device comprising: a supporting base including a depression section on a top surface thereof, the depression section having an inclined surface on a side wall thereof; a first light-emitting element arranged on a bottom surface of the depression section; and a second light-emitting element arranged on the first light-emitting element and the supporting base; a first electrode spacing the first light-emitting element from the depression section of the supporting base; and a second electrode on a bottom surface of the depression section, the second electrode (i) extending along the inclined surface of the depression section, and (ii) electrically connected to the first electrode, wherein, the first light-emitting element includes a third electrode and a fourth electrode on top and bottom surfaces thereof, respectively, the second light-emitting element includes a fifth electrode and a sixth electrode on top and bottom surfaces thereof, respectively, and the first light-emitting element is electrically connected (i) to the second electrode through the fourth electrode, and (ii) to the sixth electrode through the third electrode.

9. The light-emitting device according to claim 8 , wherein the fourth electrode has a larger area than that of the second electrode.

10. The light-emitting device according to claim 8 , wherein the fourth electrode has a smaller area than that of the second electrode.

11. The light-emitting device according to claim 8 , wherein the height of the third electrode is equal to the height of the first electrode.

12. A light-emitting device comprising: a supporting base including a depression section on a top surface thereof, the depression section having an inclined surface on a side wall thereof, the side wall spacing the depression section from an uppermost section of the top surface; a first light-emitting element arranged on a bottom surface of the depression section; a second light-emitting element arranged on the first light-emitting element and the supporting base; a first electrode (i) arranged on the uppermost section of the top surface of the supporting base, and (ii) spacing the second light-emitting element from the uppermost section of the top surface of the supporting base; and a second electrode (i) spacing the first light-emitting element from the depression section of the supporting base, (ii) extending along the inclined surface of the depression section, and (iii) operable to supply electricity to the first light-emitting element, wherein, each of the first and second electrodes includes a p-side electrode and an n-side electrode layered thereon; wherein, the supporting base includes an oxidized film between a first silicon substrate and a second silicon substrate, the depression section is arranged in the second silicon substrate, and the depth of the depression section corresponds to the thickness of the second silicon substrate.